Long distance between castles (5200/3600), if the players spawn too much defense Cat Units, Not enough space to produce will occur.

Note that if you sync the Bun Buns, the battle will become much easier. However, due to varied health and knockbacks, it is easy for them to get knocked back and will then proceed to plow your front line.

Strategies

Above all, DO NOT CONFIDE IN Necro-Dancer or any other single-target debuffs. They will likely hit the Hippoes instead and by the time any Bahamuts or ubers have taken care of the hippoes, the line would be pushed, and they would be dead.

Rather try units like Delinquent or Bodhisattva who has area attacks (Can hit through the hippoes).

Strategy 1

Begin the battle, save money and advance the front line, Bahamut Cat and Ururun Wolf must not be spawned. Adjust the production to have max money, and turn on the "Cat CPU" item when the Teacher Bun Buns appear (after damaging the Enemy Base)

Strategy 2

Stack up the Bahamuts and hit the base with the meatshileds wave. When the Bun Buns appear, start spamming the anti-floating cats, and turn on the Cat CPU, then start producing meatsheilds. Cat CPU will control the Bahamut Cat and your other dealers. Don't pick many meatshields at a time, because you will likely get caught on the "Not Enough Space" warning.

It is crucial to make the Bun Buns attack at once using either Knockbacks or the Cat Cannon.

Strategy 3

Start the battle with some stalling to build up the wallet. When there are a decent number of long-ranged Cats, advance to the Enemy Base and start the boss fight.

Only spawn Valkyrie, Bahamut and Ururun after the Bun Bun Teachers appeared. The player will be overwhelmed by the "Not Enough Space" warning, the three latter Cats will be killed and the player soon losing ground, but the Bun Bun Teachers will die one by one with the continous wave of Paris and other ranged Cats.

Strategy 4 by Okreally

Use gold, mohawk and eraser as meat shields to stave off the ginger snaches. When Shadow Boxer K appears, send out a Ring Girl Cat while continuing to use meat shields. You will need to spawn a new Ring Girl occasionally but keep close to your base for now, so don't send out more than one or two at a time.

When your $$ is maxed, send out Crazed Bahamut, Vars, God Dragon, Ring girl, King Dragon and Paris and let Valkyrie out when they got close to the base so she arrives at the same time. After that you can just spam all your cats.

I used the Iron Wall (at lvl 5) instead of regular cannon blast. I did not test this method with regular cannon.